200403989 has 4 divisors (see below), whose sum is σ = 200798220. Its totient is φ = 200009760.

The previous prime is 200403977. The next prime is 200404003. The reversal of 200403989 is 989304002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121727089 + 78676900 = 11033^2 + 8870^2 .

It is a cyclic number.

It is not a de Polignac number, because 200403989 - 2⁸ = 200403733 is a prime.

It is a super-2 number, since 2×200403989² = 80323517614224242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200403689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196352 + ... + 197369.

It is an arithmetic number, because the mean of its divisors is an integer number (50199555).

Almost surely, 2^200403989 is an apocalyptic number.

It is an amenable number.

200403989 is a deficient number, since it is larger than the sum of its proper divisors (394231).

200403989 is an equidigital number, since it uses as much as digits as its factorization.

200403989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394230.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 200403989 is about 14156.4115862743. The cubic root of 200403989 is about 585.1970398179.

The spelling of 200403989 in words is "two hundred million, four hundred three thousand, nine hundred eighty-nine".